Talk about luck or not, today my 580W Topower 686P6 psu decided to die on me

1. Booted DFI NF4 SLI-D system (at stock speeds), went into bios to disable onboard audio and rebooted pc and it didn't boot up
2. So turned psu off from the switch, cleared cmos, and then turned psu switch on and my APC BackUPS RS 1500VA UPS started screaming with red flashing overload beep alarm.
3. At this point the system automatically shut down and won't boot up anymore. ting in my pants I calmly remove the 580W Topower 686P6 psu, plug in the Antec psu tester to test the psu. PSU won't start at all testing it standalone. Looks like RMA time for 580W Topower psu sigh.

Here's the lucky part, I have this 650W Silverstone psu which i bought and arrived yesterday and i was planning to use in this DFI NF4 SLI-D system.

1. So I unpack 650W Silverstone psu, connect it standalone to Antec psu tester, and flicked the psu on switch and yup starts up and runs fine.
2. Install 650W Silverstone psu onto my DFI NF4 SLI-D system and turns on and boots up fine! Now to testing this 650W Silverstone's psu rails.

System:

3500+ CAA2C 0507 GPMW @11x201HTT = 2211mhz at 1.48v stock vcore
DFI NF4 SLI-D 331-3 bios
2x 256MB XMS3500C2v1.1 BH-5 @2226 2.7v
2x 256MB eVGA 6800Ultra PCI-E SLI @ stock 425/1100 76.10 drivers
120GB WD 1200JB
Pioneer A05 Burner

MCW6002 + MCP650+MCP600 series + Thermochill 120.3 with 3x120x38mm Panaflo 103cfm fans
120x38mm Delta 190cfm 36W fan on Thermaltake fan speed controller on Medium speed (75%)

650W Silverstone Dual PCI-E SLI ST65ZF power supply

Antec PSU Tester
12v = 12v
5v = 5.12v
3v = 3.35v

Out of box
Rail = Bios idle / MM idle
12v = 11.70v / 11.86v
5v = 4.97v / 5.10v
3.3v = 3.25v / NA

Adjusted standalone pot on side of psu
Rail = Bios / MM idle / SG idle / Load SG / Load MM
12v = 12.02v / 12.22v / 11.83v / 11.77v / 12.16v
5v = 5.13v / 5.10v / 5.16v / 5.16v / 5.10v
3.3v 3.25v / NA / 3.21v / 3.21v / NA

MM = Multimeter
SG = Smartguardian windows monitoring app

Summary:
- Seems 3.3v rail is low
- 12v rail out of the box while in system was low too at 11.70 in windows or 11.86v on multimeter
- when i set 12V to 12.28v via MM reading I didn't have 120x38mm Delta 36W fan plugged in. Plug in 36W delta fan at 75% speed, 12v rail read 12.22v on multimeter!
- 5v rail steady so no probs there
- cable length is adequate
- cable config is 2 cables with 3x 4pin molex + 1x fdd connector, 2x PCI-E connectors, 1x 6pin connector, 1x 8pin connector + 8pin to 4pin converter, 2x cables with 2x SATA connectors each

More testing to come...